DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Yun, Jong-Il | - |
dc.contributor.advisor | 윤종일 | - |
dc.contributor.author | Jung, Il-Kwon | - |
dc.date.accessioned | 2021-05-12T19:33:19Z | - |
dc.date.available | 2021-05-12T19:33:19Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=909902&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/283821 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 원자력및양자공학과, 2020.2,[v, 50 p. :] | - |
dc.description.abstract | In the present study, we aim to synthesize and characterize magnetic Mg/Al layered double hydroxide (LDH) composites and to assess the feasibility of magnetic LDH for effective iodide decontamination process. Magnetic Mg/Al layered double hydroxides (LDH) with three cationic ratios (Mg/Al = 2:1, 3:1, and 4:1) were successfully synthesized and utilized in an iodide adsorption study. The effects of the Mg/Al ratio of LDH on iodide adsorption were investigated, and physicochemical properties of synthetic LDHs depending on Mg/Al ratio were confirmed by XRD, TEM, ICP-OES, VSM, Zeta-potential, and BET analyses. The ferrimagnetic property was well preserved even after a coating of LDH on magnetite irrespective of the Mg/Al ratio. Among the three Mg/Al ratios, the calcined $Fe_3O_4$@4:1 Mg/Al LDH exhibited excellent performance for iodide removal with 105.04 mg/g of the maximum iodide adsorption capacity due to its wide interlayer spacing and largest BET surface area. In the presence of competing carbonate anions, the $Fe_3O_4$@4:1 LDH showed a removal rate of more than 80 % at a dosage of over 3 g/L solid to liquid ratio. The recyclability test of $Fe_3O_4$@4:1 LDH showed that the removal performance for iodide is maintained at more than 80 % even during the first to the fourth cycles. These results demonstrated that the magnetic Mg/Al LDH adsorbent can be effectively utilized for remediation of radioactive iodide anions with high efficiency and economics. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Iodide removal | - |
dc.subject | Adsorption▼aMagnetic layered double hydroxide (LDH)▼aMg/Al ratio▼aRecyclable adsorbent▼aMagnetic composites | - |
dc.subject | 요오드음이온 제염▼a흡착▼a자성 층상이중수산화물▼a층상이중수산화물▼aMg/Al 비▼a재사용 가능한 흡착제▼a자성 입자 | - |
dc.title | Decontamination of iodide anion from aqueous solution using magnetic Mg/Al layered double hydroxide (LDH) composites | - |
dc.title.alternative | 자성 Mg/Al 층상이중수산화물(LDH) 복합체를 이용한 수용액 내 요오드 음이온 제염 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :원자력및양자공학과, | - |
dc.contributor.alternativeauthor | 정일권 | - |
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